Response of rice cultivars to phosphorus supply on an oxisol.

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dc.contributorNAND KUMAR FAGERIA, CNPAF; ORLANDO PEIXOTO DE MORAIS, CNPAF.
dc.creatorFAGERIA, N. K.
dc.creatorMORAIS, O. P.
dc.creatorBALIGAR, V. C.
dc.creatorWRIGHT, R. J.
dc.date2021-10-05T12:00:33Z
dc.date2021-10-05T12:00:33Z
dc.date1994-10-25
dc.date1988
dc.date.accessioned2026-07-01T00:06:21Z
dc.descriptionGenotypic differences in absorption or utilization of P might be exploited to improve efficiency of fertilizer use or to obtain higher productivity on P-deficient soils. The objective of this study was to evaluate responses by 75 genotypes of upland rice (Oryza sativa L.) to two soil P levels in two field experiments. In the first experiment, soil P levels (Mehlich 1) were 1.5 mg kg-1 and 5 mg kg-1, and in the second experiment, 3 mg kg-1 and 4.7 mg kg-1 of soil, respectively. Rice cultivars differed significantly in shoot dry matter production at flowering, grain yield, and plant P status. Based on a grain yield efficiency index, cultivars were classified as P-efficient or P-inefficient. Shoot dry matter was more sensitive to P-deficiency but was not related to grain yield. Phosphorus use efficiency was higher under the low P treatment. Phosphorus uptake was significantly correlated with dry matter, P concentration and P-efficiency ratio. Results of this study indicate that genetic differences in P-use efficiency exist among upland rice cultivars and may be exploited in breeding programs.
dc.identifierFertilizer Research, v. 16, n. 3, p. 195-206, July 1988.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/197735
dc.identifierhttps://doi.org/10.1007/BF01051370
dc.identifier.urihttp://hdl.handle.net/123456789/397448
dc.languageeng
dc.rightsopenAccess
dc.subjectFertilizacao
dc.subjectGenotypic differences
dc.subjectArroz
dc.subjectCerrado
dc.subjectFósforo
dc.subjectOryza Sativa
dc.subjectOxisol
dc.subjectSolo
dc.subjectRice
dc.subjectPhosphorus
dc.subjectOxisols
dc.titleResponse of rice cultivars to phosphorus supply on an oxisol.
dc.typeArtigo de periódico

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